Django html variable inside a json string

Question

I have a json string that contains a variable.

"country": {
    "name":"England",
    "city":"London",
    "description":"This country has a land mass of {{ info.1 }}km² and population is big as <span class=\"colorF88017\">{{ info.2 }} millions</span>.",
    "info":[
        null,
        [130395],
        [5479]
    ]
}

As you see those variables are linked to a list in the json file. But when i do in the template html: {{ country.description }} It does not show what info.1 or info.2 contains. It just display everything as a text.

How can i display the value from a variable inside a string?

from django.template.loader import render_to_string
def country_info(request):
    context = {}

    show = request.GET.get("show")
    if show:
        context["country"] = get_country_json()

    return render(request, 'country_info_index.html', context)

Thanks

How are populating this in api? in api you need string contactination, but you are not doing that. And value in {{ country.description }} will always be pure text for django template — TechSavy
– TechSavy, Commented Feb 23, 2019 at 7:59
Sorry my fault, i mean from a json file in a cdn online. I read the json from the backend and render it in the frontend. Ofcourse it shows the description but does not populate the info.1 or info.2 — Printer
– Printer, Commented Feb 23, 2019 at 8:01

Hari · Accepted Answer · 2019-02-23 11:36:47Z

2

Use render_to_string pass the arguments like follow

description_template.html:
This country has a land mass of { info.1 }km² and population is big as <span class=\"colorF88017\">{ info.2 } millions</span>.

use this template in render_to_string

from django.template.loader import render_to_string
template_name = "description_template.html"
description = render_to_string(template_name, 
  context={
     "info": description
  }
)

or using f string

description =  f"This country has a land mass of { info.1 }km² and population is big as <span class=\"colorF88017\">{ info.2 } millions</span>."

edited Feb 23, 2019 at 11:36

answered Feb 23, 2019 at 8:34

Hari

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9 Comments

Printer Over a year ago

I dont really understand, can you explain bit more. Also description seems not being used. Also i use the shortcut render which seems to use render_to_string

dan-klasson Over a year ago

@Printer It parses the string before passing it to the template.

Printer Over a year ago

@dan-klasson My computer internet is gone, so i can't test it right away. But should i make a templet filter and Passing the description as value and return it as render_to_string

dan-klasson Over a year ago

@Printer Yes, that would be the better option in terms of separation of concerns. But either way works.

Printer Over a year ago

Cheers man, will give it a try and Hopefully it will work. Just need wait for my internet to come back.

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